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Baltimore, MD (Sports Network) - Chris Davis finished a perfect 4-for-4 with two homers and three RBI to offset Ryan Zimmerman's first career three-home run game, as the Orioles utilized a six-run seventh inning to outlast the Nationals, 9-6, in the first of a two-game interleague set at Camden Yards.

Nick Markakis added a solo homer and two RBI and Steve Pearce contributed a two-run shot as part of the game-changing seventh inning for the Orioles. Manny Machado and Ryan Flaherty also drove in one run in the victory.

Baltimore reliever Steve Johnson (1-1) earned the win after replacing starter Chris Tillman in the fifth with the Orioles trailing 6-2. Tillman, meanwhile, lasted 4 2/3 innings, allowing six runs on eight hits, including four homers and all three of Zimmerman's shots.

Zimmerman homered in his first three at-bats and finished with four RBI. He became the second MLB player on Wednesday to go deep three times, joining Chicago Cubs catcher Dioner Navarro, who had three home runs in a 9-3 victory over the White Sox.

Washington starter Jordan Zimmermann (8-3), who was looking to become the MLB's first nine-game winner of the season, was charged with a season-high seven runs and 10 hits over six-plus innings to absorb the loss.

Roger Bernadina hit a solo homer and Denard Span drove in the other Washington run. The clubs split a pair of games in D.C. the previous two days.

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